Multiple Chemical Sensitivity (MCS) Allergy

Multiple Ketamine Powder for sale [a.k.a Idiopathic Environmental Intolerance (IEI), 20th Century Disease Syndrome, Total Allergy Syndrome, Immune System Dysregulation, and Chemically Acquired Immunodeficiency Syndrome] refers to an unusually severe sensitivity or allergy-like reaction to a variety of pollutants such as Volatile Organic Compounds (VOC’s), perfumes, smoke, petrol, diesel, solvents, chemicals in general, and can sometimes include sensitivity to pollen, house dust mites (HDM’s), pet fur, and pet dander {1}.

It is an acquired condition, which is typically initiated by a definable exposure to a toxic substance. Symptoms of MCS are provoked by very low doses of causal factors and may occur in various organ systems {2}. The mechanism of the cause of MCS is unknown and its processes are currently not fully understood; however, it tends to occur in people with a tendency to allergies or if allergies run in the family. Usually, individuals are well until at some point in their life they are exposed to certain chemicals, either in one large dose or in repeated small doses {3}.

Causes & Mechanisms

The cause of MCS is unknown. It has however been suggested, but not proven, that chemicals travelling in the air enter the nose and affect an area of the brain known as the limbic system, which plays a role in emotions, motivated behaviour, and memory. This can make an individual more sensitive to chemical odour previously encountered. It has also been suggested, but with little evidence, that acute or chronic exposure to chemicals can cause susceptible people to lose tolerance for chemicals they could previously tolerate {4}. Some theories have suggested that the immune system of MCS patients is somehow damaged causing sensitivity to all sorts of triggers. Perhaps the most worrying feature of MCS is its ability to worsen the effect of other problems experienced by patients; these include depression, food intolerance, and asthma (to mention a few) {1}.


Individuals who suffer from MCS can have severe symptoms, which can interfere with their daily life and work. These symptoms generally occur in one of three categories: central nervous system symptoms, respiratory and mucosal irritation, or gastrointestinal problems {5}. As such, symptoms include, but are not limited to, a rapid heart rate, chest pain, sweating, shortness of breath, fatigue, tiredness which is not relieved by rest or sleep, flushing, dizziness, nausea, choking, trembling, numbness, coughing, runny nose (rhinitis), sore throat, cough, hoarseness, altered sense of smell, sensitivity to light and noise, skin rashes, itching skin, and difficulty concentrating.

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